冠层胁迫筛查
冠层含水量，在林分内、跨采集期比较。
叶片含水量，对照干物质基线测量并跨采集期比较。
Canopy water content across a conifer stand, read against a dry-matter baseline.
它能发现什么
它检测什么。
| 材料 | 典型产出环境 | 可能的混淆因素 |
|---|---|---|
| Foliar Equivalent Water Thickness (EWT) | Commercial timber plantations, watershed forests, and drought-affected stands | Understory grass drying and crown architectural shadowing |
方法
工作原理。
输入校准反射率，每个像元都对照公开参考库进行拟合。
Foliar water band depth
Foliar water absorption depth, taken against a dry-matter baseline so that leaf structure does not masquerade as moisture.
Stand-relative comparison
Moisture is compared within a stand and across dates, so every reading is judged against the ground it belongs to.
Structural correction
A canopy scattering model separates water content from canopy structure, so a dense crown does not read as a wet one.
Evaluability masking
Crown gaps where soil or rock dominates the pixel are marked, not averaged in.
技术规格
您得到什么，它在什么数据上运行。
所需环境条件
Method and checks are documented in Axine Applied Spectroscopy Paper #4 · Section 3.2.
适用边界
Needs continuous canopy cover. It reads crown moisture, compared within a stand rather than in absolute terms.
